无法在android上写入文件

<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />

private static final int REQUEST_WRITE_STORAGE = 112;

private void requestWriteExternalStoragePermission() {
    if (ContextCompat.checkSelfPermission(this, Manifest.permission.WRITE_EXTERNAL_STORAGE) != PackageManager.PERMISSION_GRANTED) {
        ActivityCompat.requestPermissions(this, new String[]{Manifest.permission.WRITE_EXTERNAL_STORAGE}, REQUEST_WRITE_STORAGE);
    } else {
        writeToFile();
    }
}

@Override
public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {
    super.onRequestPermissionsResult(requestCode, permissions, grantResults);
    switch (requestCode) {
        case REQUEST_WRITE_STORAGE: {
            if (grantResults.length > 0 && grantResults[0] == PackageManager.PERMISSION_GRANTED) {
                writeToFile();
            } else {
                // Permission denied, show a message to the user
            }
            return;
        }
    }
}

File file = new File(getExternalFilesDir(Environment.DIRECTORY_DOCUMENTS), "your_file_name.txt");

try {
    FileOutputStream fos = new FileOutputStream(file);
    fos.write("Your content here".getBytes());
    fos.close();
} catch (IOException e) {
    e.printStackTrace();
    // Handle the error, e.g., show a message to the user
}